CHEM31EX2key_2010

CHEM31EX2key_2010 - -=-1

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Name __ '_ <:--=-, ----1 y __ 1. Which of the following ions has the smallest radius? S2- A. K+ B. C. Cl D. Ca 2 + G Sc 3 + 2. Which of the following covalent bonds is the most polar? A. Si-P Si-Cl V¥- c. Si-J 0 Al-Cl E. Al-J 3. Estimate the enthalpy change, for the gas phase reaction 2CO + O 2 -- 2C0 2 given the bond energies below: = 1074k.! I mol D _ = 499k.! I mol D _ = 802k.!Imol D eEo O O e o (9 -561kJ :l. (I 0;" ",q Jc.l" -744 kJ +744 kJ --If C,Dl) k T +1949 +2380 kJ - - .. - - ._ ._._------ - -
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Name_l_ <. 4. Which one of the following molecules ha<; an atom with an expanded octet? A. HCl B. ICI Q AsCl s D. NCl 3 , , 5. The complete Lewis electron dot structure for AsCl 3 would show A total of 84 electron dots , • • , , three single bonds and 10 lone pairs GJ : Ul -. AI. - t t C. two single bonds, one double bond, and 9 lone pairs ' . \ , one single bond, two double bonds, and 8 lone pairs C1 : , E. three single bonds and one lone pair 6. Which of the following statements is inaccurate? The VSEPR model allows one to predict molecular geometries. The VSEPR model allows one to deduce atomic orbital hybridization. rJ o -:b ; r-l Atomic orbital hybridization leads to the VSEPR model. The molecular or "atom" geometry is not always the same as the h'1 b r .d \ · VSEPR electron geometry (which includes lone pairs). (J
Background image of page 2
Name 7. Which of the molecules below would have the smallest bond angle?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/05/2011 for the course CHEMISTRY 31 taught by Professor Roy during the Fall '09 term at Duke.

Page1 / 7

CHEM31EX2key_2010 - -=-1

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online